All thermoplastic ball valves shall be Compact sealed unit type constructed from PVC Type I, ASTM D 1784 Cell Classification 12454 or CPVC Type IV, Cell Classification 23447. All O-rings shall be EPDM or FKM. All valves shall have Safe-T-Shear® stem and Polypropylene handle. All EPDM valves shall be certified by NSF International for use in potable water service. All 1/2 in to 2 in valves shall be pressure rated at 235 psi, all 3 in to 6 in and all flanged valves shall be pressure rated at 150 psi for water at 73 deg F, as manufactured by Spears® Manufacturing Company.